Front portion of diaphragm



FIG. 1 is a top perspective view of a front portion of a diaphragm of the present invention;

FIG. 2 is a bottom perspective view thereof;

FIG. 3 is a top view thereof; and,

FIG. 4 is a top view thereof with a surround.

The ornamental design which is claimed is shown in solid lines in the drawings. Any broken lines in the drawings are for illustrative purposes only and form no part of the claimed design.

The broken line showing on the drawing disclosure si for illustratve purposes only and forms no part of the claimed design. 

We claim the ornamental design for a front portion of a diaphragm, as shown and described. 